Brookings, South Dakota has a Humid Continental Hot Summers With Dry Winters climate (Köppen classification: Dwa). Average annual temperatures range from 33.1 °F (low) to 53.8 °F (high). Annual precipitation averages 25.7 Inches. Brookings is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 4.2 °F | 22.6 °F | 0.51 in. |
| February | 7.7 °F | 27.1 °F | 0.58 in. |
| March | 19.8 °F | 39.3 °F | 1.19 in. |
| April | 32.0 °F | 54.0 °F | 2.22 in. |
| May | 45.1 °F | 66.6 °F | 3.41 in. |
| June | 56.4 °F | 76.7 °F | 4.23 in. |
| July | 60.2 °F | 81.3 °F | 3.63 in. |
| August | 57.1 °F | 79.0 °F | 3.23 in. |
| September | 48.3 °F | 71.8 °F | 2.97 in. |
| October | 34.5 °F | 57.6 °F | 2.06 in. |
| November | 21.6 °F | 41.4 °F | 0.91 in. |
| December | 10.2 °F | 27.7 °F | 0.72 in. |
| Annual | 33.1 °F | 53.8 °F | 25.66 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dwa - Humid Continental Hot Summers With Dry Winters |